Mojo: Add NotifyBadMessage API

mojo/public/cpp/bindings/lib/connector.h

Index: mojo/public/cpp/bindings/lib/connector.h
diff --git a/mojo/public/cpp/bindings/lib/connector.h b/mojo/public/cpp/bindings/lib/connector.h
index 243159ef32fdbe0417824bd0a50431a39903f96a..16d612b948fc75a6b095eeaff606bb26d167522b 100644
--- a/mojo/public/cpp/bindings/lib/connector.h
+++ b/mojo/public/cpp/bindings/lib/connector.h
@@ -6,6 +6,7 @@
 #define MOJO_PUBLIC_CPP_BINDINGS_LIB_CONNECTOR_H_
 
 #include <memory>
+#include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ -57,6 +58,9 @@ class Connector : public MessageReceiver {
     incoming_receiver_ = receiver;
   }
 
+  // Sets the interface name for this connector. Used only for debugging.
+  void set_interface_name(const std::string& name) { interface_name_ = name; }
+
   // Errors from incoming receivers will force the connector into an error
   // state, where no more messages will be processed. This method is used
   // during testing to prevent that from happening.
@@ -187,6 +191,9 @@ class Connector : public MessageReceiver {
 
   bool paused_;
 
+  // The name of the interface bound to this connector. Used for debugging only.
+  std::string interface_name_;
+
   // If sending messages is allowed from multiple threads, |lock_| is used to
   // protect modifications to |message_pipe_| and |drop_writes_|.
   std::unique_ptr<base::Lock> lock_;